The £1,000 trading allowance explained, and the new £3,000 reporting threshold
Two numbers decide how much admin your side income creates: £1,000 and £3,000. Most people blur them into one, then either over-report and waste hours, or under-report and risk a letter from HMRC. They are not the same thing, and the difference is worth understanding before you earn your first pound outside your salary.
This is a plain-English breakdown of the trading allowance and the new reporting threshold, with worked examples, aimed at employed professionals building a parallel income alongside a full-time job.
Both numbers, one PDF
Free PDF: The Second Income Tax Pack 2026/27
The £1,000 rule, every 2026/27 deadline, what to set aside and how to report it.
The distinction in one line
The £1,000 allowance decides whether your side income is taxed. The £3,000 threshold decides how you report it. One is about tax, the other is about paperwork.
Confusing the two is the single most common mistake new side earners make. Get them straight once and the rest of your tax admin becomes routine.
The numbers that matter
The £1,000 trading allowance
Every UK individual gets a £1,000 trading allowance each tax year. If your total gross trading income from self-employment, freelancing, or casual work is £1,000 or less, you owe no tax on it and you do not need to report it. It is the cleanest, simplest tier there is.
The word that trips people up is gross. The allowance is measured against total sales, not profit. So £1,200 of sales with £400 of costs still counts as £1,200, which is over the line, even though your profit was only £800.
Above £1,000: trading income allowance or actual expenses
Once your gross income crosses £1,000, you have to declare it, and you get to choose how your taxable figure is calculated. You can deduct the £1,000 allowance from your income, or you can deduct your actual business expenses. You cannot do both.
| Your situation | What to claim | Why |
|---|---|---|
| Real expenses under £1,000 | The £1,000 allowance | It removes more income than your costs would |
| Real expenses over £1,000 | Actual expenses | Your real costs beat the flat allowance |
| Gross income under £1,000 | Nothing to do | Covered by the allowance, no report needed |
Worked example
You earn £5,000 from freelance work with £600 of costs. Claiming the allowance gives a taxable profit of £4,000. Claiming actual expenses gives £4,400. The allowance wins by £400, because your real costs were below £1,000. Flip the costs to £1,500 and the maths reverses.
"The allowance is not a tax you pay. It is a tax you do not pay, up to a point. Knowing exactly where that point sits is what separates a calm side earner from an anxious one."
The new £3,000 reporting threshold
The government has announced plans to raise the Self Assessment reporting threshold for trading income from £1,000 to £3,000 within this parliament. This is the change that gets misread most often, so read it slowly: it is a reporting change, not a tax cut.
| Question | Answer under the new threshold |
|---|---|
| Is income above £1,000 still taxable? | Yes, tax is unchanged |
| Do you still file a full return under £3,000? | No, a simpler online service is planned |
| Does it apply yet? | Not yet, the £1,000 rule still stands today |
In short, if you earn between £1,000 and £3,000, the tax you owe stays the same, but you will be able to pay through a simpler online service rather than a full Self Assessment return. HMRC estimates around 300,000 people will no longer need to file a return as a result. Until the change takes effect, treat the £1,000 rule as live.
Earning on the side? Get the tax pack
Sixteen pages: the trading allowance, the registration test, the 2026/27 calendar, payments on account, Making Tax Digital and a twelve-point checklist. Nothing to buy.
Get the free tax pack →What this means for a parallel income
The direction of travel is clear. The government wants small secondary incomes to be easy to declare and hard to hide, and the platforms you sell through already report your sales data to HMRC directly. The smart response is not to resist that, it is to build with the grain from the start.
Boring administration is the price of a durable second income. Pay it early, when the numbers are small and the habits are easy to form, and it stays cheap for the life of the business. Leave it until the income is significant and it becomes stressful, expensive, and occasionally costly in penalties.
Related reading
- →When do you legally have to tell HMRC about your side income?
- →HMRC knows about your side hustle. Here is what platforms now report
- →How employed and self-employed tax work together in the UK
- →How much money do you actually need to start a side income in the UK
Free calculators
None of this is tax advice, and thresholds and rules change, so confirm your own position on GOV.UK or with an accountant before you file. But the principle holds regardless of the exact figures: understand the numbers that govern your side income, and you remove most of the fear that stops people building one.
Build first. Leave second. Choose third. Start with the assessment →